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Unformatted text preview: Exam 2, CHE 132 Fall 2010 Multiple Choice, 5 points each On the Scantron form, bubble in the letter of the one choice that best completes the statement or answers the question. No credit will be given for multiple answers. ____ 1. What molality of a nonvolatile non-electrolyte solute is needed to raise the boiling point of water by 7.60 °C? K b (H 2 O) = 0.52 °C kg mol –1 A 14.6 mol kg –1 B 7.08 mol kg –1 C 3.95 mol kg –1 D 0.253 mol kg –1 E 0.068 mol kg –1 ____ 2. For which of the following reactions is K p larger than K c at 25 °C ? A 2 O 3 (g) 3 O 2 (g) B Fe(s) + CO 2 (g) FeO(s) + CO(g) C 2 NO 2 (g) N 2 O 4 (g) D 2 SO 2 (g) + O 2 (g) 2 SO 3 (g) E CaO(s) + CO 2 (g) CaCO 3 (s) ____ 3. Which one of the following statements is correct? A Whenever the reaction quotient and the equilibrium constant of a reaction are different, the reaction mixture is not at equilibrium. B The molality of a solution equals the number of moles of solute dissolved in one kilogram of solution. C For a given solvent, the Henry’s law constant of the solute increases as its partial pressure increases. D The absolute entropy of an element in its stable form at 25 °C and 1 bar is zero. E An exothermic reaction is always product-favored. ____ 4. A reaction A(g) + B(g) C(g) has Δ H ° = –40.0 kJ/mol. Which of the following statements is incorrect ? A Δ S ° < 0 for the reaction B The reaction is exothermic C The reaction is reactant-favored at high temperatures D The reaction is product-favored at all temperatures E The standard Gibbs free energy of the reaction is not affected by the presence of a catalyst....
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This note was uploaded on 03/06/2012 for the course CHE 132 taught by Professor Hanson during the Fall '08 term at SUNY Stony Brook.
- Fall '08